Extension-handle construction for pneumatic tools.



ma. WILHEUVL,

EXTENSION HANDLE CONSTRUCTION FOB PNEUMATIC TOOLS.

APPLICATION mm SEPT. 22, 1916.

Pmmmeb. 5,1918.

PHDTO-LIYHO b, SACKETT 5 VALHELMS CORP N Y nussutr. n. WILHELM, orEASTON, rnnnsirnvama, 'assionon T meEnsoLL-naun new JERSEY, aconronaaion or new wasn't.-

company, or JERSEY CITY,

' EXTENSION-HANDLE eonsrnucrron non Pam/rim moons,

Toall whom at may concern:

Easton,

a which is'represented in the Tools,

Be it known that I, RUssELL HIWJLHELM, a citizen of the United States,residing at in the 'county of Northampton and State of tain new anduseful Improvement in Extene sion-Handle Constructions for Pneumatiction.

This invention relates to an improved handle construction for use withhand held pneumatic tools or similar machines which in use causediscomfort to' the operator. because of the failure to adequatelycompensate for the vibration of the machine.

Hand held pneumatic tools of the class for which the present inventionis adapted maybe operated by a single hand hold of the operator, usingsnnply the central handle portion with which such machines are provided,without lateral extensions. When, however, an easier means for holdingthe tool'to its work is desired the T handle con-. struction isemployed, providing a two hand grip. It is the object of the presentinvention to provide a T or an extension handle construction which willelfectually overcome the inherent defectsof previous types of suchhandles by eliminating the undesirable features accompanying looseningandmovement of the handle parts.-

The above object has been accomplished by the invention,- a practicalembodiment of accompanying drawings, in which,

' Figure 1 shows a view partly in vertical Section andpartly inelevation of a portion of a'hand held pneumatic tool provided.

with a handle construction embodying my invention, and, f I F1g. 2 1s atransverse vertical sectlon partly in elevation, on the 1ine II I I 0%Fig. 1. j

The device is shown as applied to a ham- 345i.

mer drill of ordinary construction, it beingsufiicient for the presentpurposeto illustrate but a portion of the cylinder 1 of such 7 a drills,Superimposed on theicylinder 1 is I so "the'back 'head 2 whichterminates in a central-handle portion 3. The grip portion 4 of thiscentral liandleportlon 3 has a bore 5 axiallyltherethroughiand in thisbore is fittedgaboltfi If ordinary constru'ction andconsiderable-length, having a headland a threaded pontionf"8,;a,Situated on: this bolt 7 central handle Pennsylvania, have invented acer of'which the following is a specifica- '6. This end bushing 12 is ofsufiicient. width with respect to the mg non-rotatable with respect-to,the bolt- 6 because of the positive lock provided by c 5' Patent d retan, rate..-

hpplication filed September 22, 191a seriaino .1a1,5ee;

6, one abutting against each extremity of the portion 3, are a pair oflongitudmal bushings 9. and against .the'outerends these longitudinalbushings 9 and 10 are, respectively, disk shaped end bushings l1 and 12,(which end bushings may, however, be constructed as integral parts ofthe longitudinal bushings 9 and 10, respect1vely-,if desired), thebushing 11 brmging up against the inner end ofthe bolt head 7. The endbushing 12 has internal longitudinal recesses '13 and I l and throughthe bolt 6, adjacent to its threaded extremity, is a diametrical hole 15for the reception of a pin or key 16 the ends of the end bushing 12andconstitute a positive lock against relative rotative movement of the endbushing 12 with respect to the bolt to permit of a'slight longitudinalmovement pin or key 16 as the parts are brought tightly together and toallow {or a possible stretching of the bolt. Thethreaded end of the bolt6 is provided with the end bushing 12' is interposed a split lock.washer 18, which lock washer may, however, be of any desired lockingconstruction. Surrounding the longitudinal bushings 9 and 10 are gripportions '19 andQO, which may be constructed of rubber'or any otherdesired material possessing resiliency.

The intention of the present construction will at once be understood.When the parts have been assembled as described the nut, 17

is tightened up; compressing the lock washer 18, thus efl'ectuallylocking the handle parts together and forming a practically unified lltwill be seen that by reason of abutting facesofthe nutl'Z and endbushing 12, the nut, lock washer; 'and jbushingfare positivelylockedqagainst rotation'jgwith re spect toeach other, and the bushing12, be

the pin 16 as above "described, -,"serv,es to maintain the non-movablerelationshipfber 105 and nut 17. Should the resilient gripl-pontweenthe'bolt 6, bushing 12, lock washer 18 tions 19and 20 becaused to rotateon,j;the longitudinal bushings, for any "reason,"'thisf. rotatiyemovement can not be communicated.

to theflock washer 18 and thence to the unit 110 10, and abutting i I7'0which extend into the recesses13 and .14 of I .80 usual nut 17andbetween this nut 17 andthe I case with previously constructed handlesof this type in Which no positive means has been provided for preventingrotative movement of the bolt and the nut with respect to each other.

It is to be understood that while nitpresent showing and descriptiondisclose only one specific embodiment of the present invention,other-forms. and modifications are included Within the spirit and scopeof the same, as expressed in the appended claims.

What I claim is: 1. 'In an extension handle construction for pneumatictools and the like, a handle por- -tion, a bolt passing axiallytherethrough and projectingbeyond the ends thereof, means forse'curinggrip portions on the projecting ends of said bolt and means formaintainingthe said grip securing means, handle and v bolt innon-movable relationship.

' 2. In an extension handle construction for I pneumatic tools and thelike, a handle portion, a bolt passing axially therethrough and"projecting beyond the ends thereof, means for securing grip portions.on the projecting ends ofsaid bolt, means for securing the f handle,bolt, grip-securingmeans and grip portions in assembled relationship andmeans on the bolt for preventing unintentional displacement of saidlatter means,

3. In an extension handle construction for pneumatic tools and the ike,a handle portion, a bolt passing axially therethrough and projectingbeyond the ends thereof, bushings on the projectin ends of said bolt,grip por tions on said bus ings and means on the bolt for maintainingthe said bushings in nonmovable relationship with respect to said bolt.

4:- In an extension handle constructionfor pneumatic tools and the like,a handle portion, a bolt passing axially therethrough and projectingbeyond the ends thereof, grip portions on said projecting bolt ends, anda pin passing transversely through the bolt near one end for securing.said grip portions against rotative movement with respect to the bolt;

' pneumatic 5. Inan extension handle construction for tools and thelike, a central handle portion ring a vbore axiallythereoassing'througl-i s on the projecting ends" of said bolt, gripportions on said bushings, an end bushing at the outer end of one ofthelongitudinal bushings and means on the bolt for main taining the saidend and longitudinal bushings in non-movable relationship.

' 6. In an extension handle construction for pneumatic" tools and thelike, a central hain dle portion, having a bore axially therethrough, abolt passing through said bore and projecting beyond the extremities ofsaid handle portion, an end bushing adjacent to one end of the bolt anda pin passing transversely through the bolt near said end having itsends projecting into recesses in the bushing at said end forsecuring thesaid bushing against rotative movement with respect to the bolt.

7. In an extension handle construction for pneumatic tools and the like,a handle portion, a bolt passing axially therethrough, the said bolthaving a head at one end and being threaded for the reception of a nutonthe other, a longitudinal bushing on each of the projecting ends of saidbolt, grip portions on said bushings, a nut on the threaded end ofthebolt and an end bushing interposed 'between the nut and bushing adjacentto said threaded end, the said end bushing being-v non-movablerotatively With respect to the bolt for preventing the transmission ofrotative movement to the nut.

'8. In an extension handle construction for pneumatic tools and thelike,-a handle portion, a bolt passing axially therethrough andprojecting beyond the ends thereof, bushings on the projecting ends ofsaid bolt, grip portions on said bushings, and a pin passingtransversely through the bolt near one end engaging the bushing at saidend for securing said bushing against rotative movement with respect tothe bolt.

9. In an extension ha'ndle 'construction for pneumatic tools and thelike, a centralhan-i -dle portion, having a bore axially therethrough, abolt passing through said bore and projecting beyond the extremities ofsaid handle portion, longitudinal bushings on the projecting ends ofsaid bolt, grip per- 5 tions on said bushings, and a pin passingtransversely through the bolt near one end having its ends projectinginto recesses in the bushing at said end for securing the said bushingagainst rotative movement with respect to the bolt.

10. In an extension handle construction for pneuinatiestools rnd thelike, a central handle portion, a bolt pas singaxially therethrough andprojecting beyond the ends thereof, bushings on the projecting ends ofsaid bolt, resilient grip portions on said bushings, a ":in passingtransversely through the bolt near one end having its ends prointo rccesin the bushing at said end, a nut threaded end of the bolt and a lockingwasher interposed between said nut and the bushing adjacent to thethreaded end for positively locking the nut,

lock washer, bushingand bolt against unintentional rotative, movementwith respect to each other.

.11. In an extension handle construction for pneumatic tools and thelike, a central handle portion having a bore axially therethrough, 'a'bolt passing through said bore and projecting beyond the ends ofsaidhandle, the said bolt having a head at one end and being threaded forthe reception of a nut on the other, a longitudinal -bushing on each ofthe projecting ends. of said bolt, resilient grip portions on saidbushings,

a slot, passing transversely through the bolt at the threaded end and apin in said slot for securing the bushing at said end'against rotativemovement with respect to the bolt,

a nut 0n the threaded end of said bolt and a locking washer interposedbetween the nut and bushings for securing the nut and bushings inassembled non-movable relationship.

12. In an extension handle construction for pneumatic tools and thelike, a central handle portion, a bolt passing axially therethrough andprojecting beyond the ends thereof, longitudinal bushings on'theprojecting ends of said bolt, grip portionson said-longitudinalbushings, an end bushing abutting against the longitudinal bushing andgrip portion adjacent to the threaded.

end of the bolt, a pin passing transversely through the bolt at saidthreaded end having its ends projecting into recesses in said endbushing for securing the end bushing against rotative movement withrespect two-f the bolt, a nut on-the threaded end of the I RUSSELL H.WILHELM.

